PRODINFO: Revamp blanking/write disallow policy. (#913)

* exo/fusee: hookup new prodinfo settings

* fusee: new scheme doesn't need FLAGS_DEFAULT

* fusee: fix c/p errors

* ams.mitm: completely revamp prodinfo backup mechanism

* ams.mitm: Implement revamped blanking/write policy

* strat: make early boot more debuggable

* exo: condense flag logic

stratosphere/ams_mitm/source/bpc_mitm/bpc_ams_service.hpp

@@ -22,13 +22,16 @@ namespace ams::mitm::bpc {
     class AtmosphereService final : public sf::IServiceObject {
         private:
             enum class CommandId {
-                RebootToFatalError = 65000,
+                RebootToFatalError      = 65000,
+                SetInitialRebootPayload = 65001,
             };
         private:
             void RebootToFatalError(const ams::FatalErrorContext &ctx);
+            void SetInitialRebootPayload(const ams::sf::InBuffer &payload);
         public:
             DEFINE_SERVICE_DISPATCH_TABLE {
                 MAKE_SERVICE_COMMAND_META(RebootToFatalError),
+                MAKE_SERVICE_COMMAND_META(SetInitialRebootPayload),
             };
     };